12123213 has 8 divisors (see below), whose sum is σ = 16212000. Its totient is φ = 8058288.

The previous prime is 12123211. The next prime is 12123217. The reversal of 12123213 is 31232121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12123213 - 2¹ = 12123211 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12123192 and 12123201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12123211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4743 + ... + 6836.

It is an arithmetic number, because the mean of its divisors is an integer number (2026500).

Almost surely, 2^12123213 is an apocalyptic number.

It is an amenable number.

12123213 is a deficient number, since it is larger than the sum of its proper divisors (4088787).

12123213 is a wasteful number, since it uses less digits than its factorization.

12123213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11931.

The product of its digits is 72, while the sum is 15.

The square root of 12123213 is about 3481.8404615950. The cubic root of 12123213 is about 229.7237578284.

Adding to 12123213 its reverse (31232121), we get a palindrome (43355334).

The spelling of 12123213 in words is "twelve million, one hundred twenty-three thousand, two hundred thirteen".